Skip to main content

Characteristic length scales for vortex detachment on plunging profiles with varying leading-edge geometry

Abstract

Experiments on leading-edge vortex (LEV) growth and detachment from a plunging profile have been conducted in a free-surface water tunnel. Direct-force and velocity-field measurements have been performed at a Reynolds number of Re = 10,000, a reduced frequency of k = 0.25, and a Strouhal number of St = 0.16, for three varying leading-edge geometries. The leading-edge shape is shown to influence the shear layer feeding the LEV, and thus to some extent the development of the LEV and associated flow topology. This effect in turn influences the arrival time of the rear (LEV) stagnation point at the trailing edge, which, once breached, constitutes a detachment of the LEV. It is found that despite minor phase changes in LEV detachment through leading-edge shape, the position of the trailing edge (chord length) should be chosen as the characteristic length scale for the vortex separation process.

This is a preview of subscription content, access via your institution.

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8
Fig. 9
Fig. 10

References

Download references

Acknowledgments

This project was funded by the Natural Science and Engineering Research Council of Canada (NSERC) and the Deutsche Forschungsgemeinschaft (DFG). The authors gratefully thank Prof. John Foss for the fruitful discussions regarding the topology of this flow.

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to David E. Rival.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Rival, D.E., Kriegseis, J., Schaub, P. et al. Characteristic length scales for vortex detachment on plunging profiles with varying leading-edge geometry. Exp Fluids 55, 1660 (2014). https://doi.org/10.1007/s00348-013-1660-x

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • DOI: https://doi.org/10.1007/s00348-013-1660-x

Keywords

  • Vortex
  • Vorticity
  • Particle Image Velocimetry
  • Shear Layer
  • Strouhal Number